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A “power bump” was reported at Los Angeles International Airport on Monday evening and delayed some flights, officials said.

The issue was reported around 7:30 p.m. by LAX officials in a tweet.

Many systems at the airport came back online after the power issue was reported, but some terminals were on backup power including Terminal 6 until about 8:50 p.m.

Extra staff and airport police were called in to help and officials urged travelers on Alaska Airlines to check their flight status.